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#1
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climate control troubleshooting
Ok so in my girlfriend's 300CD and in my 300SDL when off the climate control will Kick on randomly.. Sometimes it will stay on some times it will turn off after a few seconds.
both have gotten much worse over time. Hers has gotten to the point where it rarely works unless it decides to turn itself on breifly, Mine has shown these symptom for a while, but is getting to the point where it happens quite frequently, as in every five mins of driving.... Anyone ever had this happen to them? How'd you fix it? |
#2
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It may be a failing CCU, you may want to pull it and check for cold solders, if you find any, re-flow the solder, adding some if necessary.
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83 SD 84 CD |
#3
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The search feature works wonders. Lots of information on this subject.
However look at this.................. http://w123maintenance.blogspot.com/2007/10/automatic-climate-control-unit-repair.html
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DO IT RIGHT THE FIRST TIME, DON'T BE A HACK Political Correctness is NOT part of my vocabulary and finally FIGHT CRIME...SHOOT BACK '82 240D Stick '85 300D Auto Drove my first MB at age 16 1960 300SL W190 |
#4
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Quote:
also checkout the kilma relay out too
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#5
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I had the same problem with an 84 300D's CCU. It's probably a failing CCU unit. I'd try to re-flow it, as others have stated, adding solder where needed. If that doesn't work, you might want to look into a rebuilt / remanufactured unit off Ebay - one can be had for under $300.
Once you get it working, I'd also highly suggest putting a 1A fuse in-line with the auxiliary water pump. When those things blow, they have a nasty tendency of taking the CCU out with it.
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_______________________________ (Oo{=|=}oO) 1983 MB 300D USA, 212,000mi. 80's yellow/white. "Gunther" (Oo{=|=}oO) 1984 MB 300D Euro, Turbo Added in Germany, 186,000mi [SOLD] Missing her dearly. (Oo{=|=}oO) 1984 MB 300D USA Turbodiesel, 269,000mi. [SOLD] |
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